(GRGC) Coll Research: Paleofloral and Stratigraphic Analysis and Eocene-Oligocene Climate Change in a Single Continental Section in North-Central Oregon
(GRGC) Coll 研究:俄勒冈州中北部单一大陆部分的古植物和地层分析以及始新世-渐新世气候变化
基本信息
- 批准号:9418210
- 负责人:
- 金额:$ 3.03万
- 依托单位:
- 依托单位国家:美国
- 项目类别:Standard Grant
- 财政年份:1995
- 资助国家:美国
- 起止时间:1995-04-01 至 1997-09-30
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
9418210 Smith Climate change near the Eocene-Oligocene boundary was one of the most significant environmental changes of the Phanerozoic. The nature of this geologically abrupt global cooling, and hypotheses for its cause, have come largely from study of continuous marine stratigraphic records. In order to understand the dynamics of global climate change, it is essential to better understand the nature of the early Oligocene climatic deterioration on continents. To date, the interpretation of climate change at the time in North America has been based on scattered, and in some cases poorly dated, paleo-floras. Ambiguities remain, therefore, on age relationships of these climatically-sensitive floras and the extent to which differences between them represent true temporal change rather than variations in altitude and other environmental parameters between floral sites. We will study a sequence of fossil floras preserved in a single stratigraphic sequence, in north-central Oregon, where reconnaissance work suggests a record of the entire climate change. Detailed collection, study, and interpretation of these floras will be complemented by geologic mapping, sedimentological, and stratigraphic study to assure the stratigraphic framework of strata containing the fossils and the depositional environments (and thus environmental or taphonomic biases) represented by beds enclosing the floras. The paleofloras are hosted in volcaniclastic sediment interlayered with tuffs and lava flows that will be dated by 40Ar/39Ar method in order to constrain the chronology of the climatically- driven floral change in central Oregon.
始新世—渐新世界线附近的气候变化是显生宙最重要的环境变化之一。这种地质上突然的全球变冷的性质,以及对其原因的假设,主要来自对连续的海洋地层记录的研究。为了了解全球气候变化的动态,有必要更好地了解早渐新世大陆气候恶化的性质。到目前为止,对当时北美气候变化的解释一直是基于分散的,在某些情况下是不确定年代的古植物群。因此,对于这些气候敏感植物群的年龄关系,以及它们之间的差异在多大程度上代表了真正的时间变化,而不是海拔和其他环境参数在花区之间的变化,仍然存在模糊性。我们将在俄勒冈州中北部研究保存在单一地层序列中的化石植物序列,那里的勘测工作显示了整个气候变化的记录。对这些植物群的详细收集、研究和解释将辅以地质制图、沉积学和地层学研究,以确保包含化石的地层的地层格架和由包围植物群的地层所代表的沉积环境(因此是环境或地层学偏差)。古植物群分布在火山碎屑沉积物中,与凝灰岩和熔岩流相互交错,将通过40Ar/39Ar方法确定年代,以限制俄勒冈中部气候驱动的植物变化的年代学。
项目成果
期刊论文数量(0)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
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Gary Smith其他文献
A review of open-source machine learning algorithms for twitter text sentiment analysis and image classification
Twitter 文本情感分析和图像分类的开源机器学习算法综述
- DOI:
10.1109/ijcnn48605.2020.9207544 - 发表时间:
2020 - 期刊:
- 影响因子:0
- 作者:
Conor Lynch;Christian O'Leary;Gary Smith;Rose Bain;Jacqueline Kehoe;A. Vakaloudis;Richrd Linger - 通讯作者:
Richrd Linger
AS13 The association between end-tidal CO2 and CPR quality metrics in out-of-hospital cardiac arrest
- DOI:
10.1016/s0300-9572(11)70014-4 - 发表时间:
2011-10-01 - 期刊:
- 影响因子:
- 作者:
Daniel Spaite;Uwe Stolz;Annemarie Silver;Christopher Kaufman;Keith Pyers;Gary Smith;Mark Venuti;Margaret Mullins;Bentley Bobrow;Gordon Ewy - 通讯作者:
Gordon Ewy
MP39-14 IRON ACCUMULATION DURING RENAL CELL CARCINOGENESIS AND REVERSAL WITH TUMOR PROGRESSION
- DOI:
10.1016/j.juro.2017.02.1188 - 发表时间:
2017-04-01 - 期刊:
- 影响因子:
- 作者:
Christopher Greene;Ramkishen Narayanan;Cornelia Willis;Nitika Sharma;Gary Smith;Kenneth Gross;Bo Xu;Eric Kauffman - 通讯作者:
Eric Kauffman
The long run implications of a two sector model with immobile capital
- DOI:
10.1007/bf01718659 - 发表时间:
1980-03-01 - 期刊:
- 影响因子:2.300
- 作者:
Gary Smith - 通讯作者:
Gary Smith
Gary Smith的其他文献
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{{ truncateString('Gary Smith', 18)}}的其他基金
SBIR Phase II: A Mechanical Blood Clot Removal Device for Pulmonary Embolism
SBIR II 期:用于肺栓塞的机械血凝块去除装置
- 批准号:
1852902 - 财政年份:2019
- 资助金额:
$ 3.03万 - 项目类别:
Standard Grant
MRI: Acquisition of an 800 MHz NMR Spectrometer
MRI:购买 800 MHz NMR 波谱仪
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0722538 - 财政年份:2007
- 资助金额:
$ 3.03万 - 项目类别:
Standard Grant
Acquisition of a 600 MHz NMR Spectrometer
购买 600 MHz NMR 波谱仪
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0443516 - 财政年份:2005
- 资助金额:
$ 3.03万 - 项目类别:
Standard Grant
Integrated stratigraphic, geomorphic, sedimentologic, numeric, and experimental study of hangingwall ramp architecture in continental half grabens
大陆半地堑上盘斜坡结构的综合地层学、地貌、沉积学、数值和实验研究
- 批准号:
0344146 - 财政年份:2004
- 资助金额:
$ 3.03万 - 项目类别:
Continuing Grant
Comprehensive Upgrade of a Shared Campus Nuclear Magnetic Resonance Facility
校园共享核磁共振设施全面升级
- 批准号:
0079461 - 财政年份:2000
- 资助金额:
$ 3.03万 - 项目类别:
Standard Grant
Comprehensive Upgrade of a Shared Campus NMR Facility
校园共享核磁共振设施全面升级
- 批准号:
9724412 - 财政年份:1997
- 资助金额:
$ 3.03万 - 项目类别:
Standard Grant
Outcrop Characterization of Heterogeneity: Explicit Linkage of Hydrological and Sedimentological Properties
露头的非均质性特征:水文和沉积物特性的明确联系
- 批准号:
9706116 - 财政年份:1997
- 资助金额:
$ 3.03万 - 项目类别:
Standard Grant
Variable Hillslope Processes and Sediment Delivery to Tectonically-Quiescent Basins: A Late Miocene to Quaternary Record of Buried, Relict, and Modern Hillslopes and their Deposits
变化的山坡过程和沉积物向构造静止盆地的输送:中新世晚期到第四纪埋藏山坡、遗迹山坡和现代山坡及其沉积物的记录
- 批准号:
9706051 - 财政年份:1997
- 资助金额:
$ 3.03万 - 项目类别:
Standard Grant
The Relationship of Textures and Depositional Structures in Pyroclastic-flow Deposits to Paleomagnetically Determined Emplacement Temperatures
火山碎屑流沉积物中的结构和沉积结构与古地磁确定的就位温度的关系
- 批准号:
9316538 - 财政年份:1994
- 资助金额:
$ 3.03万 - 项目类别:
Standard Grant
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